MDRX HPA dwell setup

Official HPA video workshop · 5:12

MDRX HPA dwell setup

Optional HPA platform only — never treat this as stock AEG maintenance.

Safety and limits. Wear eye protection. Connect air/battery only for controlled function and chronograph checks; disconnect both before service. Silverback recommends a maximum of 8 bar / 116 psi. Chronograph with the BB weight used and comply with local limits.

Chronograph-led procedure

  1. Start point (00:14): use the factory value shown below. The correct dwell depends on regulator pressure.
  2. Set energy first: load your game BBs, set hop-up minimum, and chronograph. The video begins at 5.5 bar / 80 psi.
  3. Do not exceed 8 bar / 116 psi: if more energy is needed, select a less restricted nozzle rather than increasing pressure beyond the recommendation.
  4. Empty the feed tube (02:22). Enter programming, select dwell with two trigger pulls, and validate using SINGLE → FULL → SINGLE.
  5. Reduce progressively and test: after each decrease, test single and full-auto and chronograph. If function, energy, or consistency drops, increase dwell by 0.5 ms and re-test.

Official video

Procedure frames

Initial dwell
Initial dwell · 00:14
Chronograph preparation
Chronograph preparation · 00:50
Pressure limit
8 bar / 116 psi limit · 01:46
Dwell programming
Dwell programming · 02:28
Stability check
Stability check · 04:29

FAQ

What is the initial dwell?

The official video states 12 ms.

Why respect the 8 bar pressure ceiling?

Use the verified maximum below; choose a less restricted nozzle for a different range and re-chrono legally.

Verified pressure maximum.

The maximum recommended HPA pressure is 8 bar / 116 psi.

Verified setting.

The factory HPA dwell is 12 ms.

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